One vertex per element, one color per generator, with an edge from x to x·s.
(2,5)(3,7)(9,10)(11,15)(12,14)(13,16)(19,20)(23,24)(27,29)(28,30) involution — undirected(1,2)(3,6)(4,5)(7,8)(9,11)(10,13)(12,16)(14,15)(17,18,21,25)(19,27,20,29)(22,32,31,26)(23,30,24,28)(10,14)(13,15)(17,19,21,20)(18,23,25,24)(22,30,31,28)(26,29,32,27)(1,3,4,7)(2,6,5,8)(10,14)(13,15)(2,5)(6,8)(11,16)(13,15)(17,20,21,19)(18,24,25,23)(22,28,31,30)(26,27,32,29)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.